org.apache.calcite.plan

Class RelOptUtil.RexInputConverter

java.lang.Object

org.apache.calcite.rex.RexShuttle

org.apache.calcite.plan.RelOptUtil.RexInputConverter

All Implemented Interfaces:

RexVisitor<RexNode>

Direct Known Subclasses:

PushProjector.RefAndExprConverter

Enclosing class:

RelOptUtil

public static class RelOptUtil.RexInputConverter
extends RexShuttle

Walks an expression tree, converting the index of RexInputRefs based on some adjustment factor.

Field Summary

Fields

Modifier and Type	Field and Description
private int[]	adjustments
protected List<RelDataTypeField>	destFields
private List<RelDataTypeField>	leftDestFields
private int	nLeftDestFields
protected RexBuilder	rexBuilder
private List<RelDataTypeField>	rightDestFields
private List<RelDataTypeField>	srcFields

Constructor Summary

Constructors

Modifier	Constructor and Description
	RexInputConverter(RexBuilder rexBuilder, List<RelDataTypeField> srcFields, int[] adjustments)
	RexInputConverter(RexBuilder rexBuilder, List<RelDataTypeField> srcFields, List<RelDataTypeField> destFields, int[] adjustments)
	RexInputConverter(RexBuilder rexBuilder, List<RelDataTypeField> srcFields, List<RelDataTypeField> leftDestFields, List<RelDataTypeField> rightDestFields, int[] adjustments)
private	RexInputConverter(RexBuilder rexBuilder, List<RelDataTypeField> srcFields, List<RelDataTypeField> destFields, List<RelDataTypeField> leftDestFields, List<RelDataTypeField> rightDestFields, int[] adjustments)

Method Summary

Modifier and Type	Method and Description
RexNode	visitInputRef(RexInputRef var)

Methods inherited from class org.apache.calcite.rex.RexShuttle

apply, apply, apply, mutate, visitArray, visitCall, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitFieldCollations, visitList, visitList, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef, visitWindow

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

rexBuilder

protected final RexBuilder rexBuilder

srcFields

private final List<RelDataTypeField> srcFields

destFields

protected final List<RelDataTypeField> destFields

leftDestFields

private final List<RelDataTypeField> leftDestFields

rightDestFields

private final List<RelDataTypeField> rightDestFields

nLeftDestFields

private final int nLeftDestFields

adjustments

private final int[] adjustments

Constructor Detail

RexInputConverter

private RexInputConverter(RexBuilder rexBuilder,
                          List<RelDataTypeField> srcFields,
                          List<RelDataTypeField> destFields,
                          List<RelDataTypeField> leftDestFields,
                          List<RelDataTypeField> rightDestFields,
                          int[] adjustments)

Parameters:

rexBuilder - builder for creating new RexInputRefs

srcFields - fields where the RexInputRefs originated from; if null, a new RexInputRef is always created, referencing the input from destFields corresponding to its current index value

destFields - fields that the new RexInputRefs will be referencing; if null, use the type information from the source field when creating the new RexInputRef

leftDestFields - in the case where the destination is a join, these are the fields from the left join input

rightDestFields - in the case where the destination is a join, these are the fields from the right join input

adjustments - the amount to adjust each field by

RexInputConverter

public RexInputConverter(RexBuilder rexBuilder,
                         List<RelDataTypeField> srcFields,
                         List<RelDataTypeField> leftDestFields,
                         List<RelDataTypeField> rightDestFields,
                         int[] adjustments)

RexInputConverter

public RexInputConverter(RexBuilder rexBuilder,
                         List<RelDataTypeField> srcFields,
                         List<RelDataTypeField> destFields,
                         int[] adjustments)

RexInputConverter

public RexInputConverter(RexBuilder rexBuilder,
                         List<RelDataTypeField> srcFields,
                         int[] adjustments)

Method Detail

visitInputRef

public RexNode visitInputRef(RexInputRef var)

Specified by:

visitInputRef in interface RexVisitor<RexNode>

Overrides:

visitInputRef in class RexShuttle